I have actually seen a lot of industrial diesel engines with front or damper end crankshaft failures. I think problems like that are from constant running under close to overloaded conditions, or could be from constant idling, I'm not sure.

I think intermittent firing during shutdown or startup from lack of maintenance will produce spikes that concentrate forces in these areas (likely high reverse torsion forces). On the 300 SDL (automotive) I think it was also the reason for the high failure rate of the serpentine belt tensioner.